It has been made ceramic body stoneware using a mixture of Kalimantan clay, RRC feldspar, Belitung kaolin, Belitung quartz and Bukit Jimbaran limestone further coded BPC-1. This study aims to determine the value of dry shrinkage, the effect of sintering temperature of 900oC and 1200oC against firing shrinkage, and the influence of sintering temperature of 900oC and 1200oC against porosity in the ceramic body stoneware. Ceramic stoneware burned with a temperature variation of 900oC and 1200oC. The results show the value of dry shrinkage in ceramic stoneware of 2.9%. Stoneware ceramic firing shrinkage at a temperature of 900 oC combustion of 1.3%, and the combustion at a temperature 1200oC of 3.8%. Porosity ceramic stoneware at a temperature of 900oC combustion showed porosity of 10.5%, while the combustion at a temperature 1200oC of 5.5%. Show that the combustion temperature greatly affects the value of dry shrinkage, firing shrinkage and porosity of stoneware ceramics. The higher the combustion temperature the higher the shrinkage and the decreasing the porosity.
AbstrakIndonesia dikenal memiliki sumberdaya mineral yang berlimpah dan beberapa diantaranya belum termanfaatkan dengan baik. Batuan beku dari daerah Gayo, yang terletak di Aceh diduga memiliki kandungan felspar yang dapat digunakan sebagai bahan baku pembuatan keramik. Penelitian ini dimaksudkan untuk mengetahui kandungan batuan Gayo dan fisibilitasnya sebagai bahan keramik. Untuk itu telah dilakukan identifikasi kandungan mineral yang ada dalam batuan tersebut dan kemudian dibuat komposisi bahan baku keramik stoneware dengan metode pencampuran triaxial. Perlakuan proses sintering pada suhu yang berbeda (800, 900, 1000, 1100 dan 1250 o C) dilakukan untk mengetahui efek perbedaan suhu sintering terhadap badan keramik. Dari percobaan tersebut, diketahui bahwa batu Gayo mengandung kandungan feldspar sebesar 69 % dengan berat jenis batu Gayo yang diuji adalah 2,6963 + 0,1290 gram/cm 3 . Pada pengujian sampel, diperoleh hasil pada suhu sintering 1250 o C dicapai peresapan air 1,09%, suatu angka yang termasuk dalam daerah peresapan air untuk keramik stoneware menurut ketentuan ISO 10543-3 / ASTM C373 yaitu <3%. Prototipe benda keramik yang dibuat dengan teknik putar menunjukkan kualitas yang baik berdasarkan ketentuan SNI 7275:2008 (tidak retak, bentuk terjaga, badan keramik padat). AbstractIndonesia is known to have abundant mineral resources and some of them have not been properly utilized. Frozen rock from Gayo area, Aceh is suspected to have a feldspar content that can be used as a raw material for the manufacture of ceramics. This study is intended to determine the content of Gayo rocks and their compatibility as ceramic materials. For that purpose, has been identified the existing mineral content in these rocks and then made the composition of stoneware ceramic raw materials with triaxial blend method. Different sintering temperature (800, 900, 1000, 1100 and 1250 o C respectively) has been conducted to known the efffect of sintering temperature on ceramic body. From the experiment, it is known that Gayo stone contains 69%of feldspar with specific gravity is 2.6963 + 0.1290 gram / cm 3 . In the sample test, the results obtained at the sintering temperature of 1250 o C achieved 1.09% water absorption, a number which is included in the water impregnation area for stoneware ceramics according to the provisions of ISO 10543-3 / ASTM C373 ie <3%, .The prototype of ceramic objects made with rotary technique showing good quality according to the provisions of SNI 7275:2008 (not cracked, shape do not change, solid ceramic body). .
Indonesia is known to have abundant mineral resources and some of them have not been properly utilized. Frozen rock from Gayo area, Aceh is suspected to have a feldspar content that can be used as a raw material for the manufacture of ceramics. This study is intended to determine the content of Gayo rocks and their compatibility as ceramic materials. For that purpose, has been identified the existing mineral content in these rocks and then made the composition of stoneware ceramic raw materials with triaxial blend method. different sintering temperature (800, 900, 1000, 1100 and 1250 oC respectively) has been conducted to known the efffect of sintering temperature on ceramic body. From the experiment, it is known that Gayo stone contains 69%of feldspar with specific gravity is 2.6963 + 0.1290 gram / cm3. In the sample test, the results obtained at the sintering temperature of 1250oC achieved 1.09% water absorption, a number which is included in the water impregnation area for stoneware ceramics according to the provisions of ISO 10543-3 / ASTM C373 ie <3%, .The prototype of ceramic objects made with rotary technique showing good quality (not cracked, shapedo not change, solid ceramic body
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